# JS Maintenance Mate vs Fourth Space

The clearest difference is update cadence: Fourth Space at fortnightly against JS Maintenance Mate's every 5 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

JS Maintenance Mate ships an update every 5 weeks, Fourth Space fortnightly. The most recent releases landed on October 27, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | JS Maintenance Mate | Fourth Space |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (3 ratings)](https://appshunter.io/ios/app/fourth-space/id6670521483/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | — | Free |
| Size | 26 MB | 12 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [JS Proputec AS](https://appshunter.io/developer/1542351307) | [第肆空间(深圳)创新科技有限公司](https://appshunter.io/developer/1766639077) |

## What reviewers say

### JS Maintenance Mate

[App page](https://appshunter.io/ios/app/js-maintenance-mate/id1542351245)

**Features:** macOS Compatibility

**In-app purchases:** none


### Fourth Space

[App page](https://appshunter.io/ios/app/fourth-space/id6670521483)

Control your air conditioner remotely with this app. Adjust temperature, fan speed, mode, and power settings for a convenient smart home experience.

**Highlights:** Remote air conditioner control, Turn on/off AC, Adjust temperature, Set fan speed, Change operating mode

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JS Maintenance Mate free?

JS Maintenance Mate is free to download, with no in-app purchases.

### Is Fourth Space free?

Fourth Space is free to download, with no in-app purchases.

### Do JS Maintenance Mate or Fourth Space have ads?

Neither JS Maintenance Mate nor Fourth Space shows ads.

### Which is updated more often, JS Maintenance Mate or Fourth Space?

JS Maintenance Mate ships an update every 5 weeks, and Fourth Space fortnightly. Most recently, JS Maintenance Mate was updated on October 27, 2026 and Fourth Space on October 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*